2 Syllables: SU
anno, ano, arrow, backbone, barrow, blackstone, castro, facto, fallow, gladstone, glasgow, hallow, harrow, narrow, palo, paso, sallow, shadow, shallow, tallow, tasso
3 Syllables: USU
4 Syllables: UUSU
Found 28 words across 3 groupings. Skipped 3 excess words of a similar stem.